如图,已知抛物线C1∶y2=4x,椭圆C2∶
.过点E(m,0)作椭圆C2的切线交抛物线C1于A、B两点(其中m>2).在x轴上取点G使得
.
![](https://img.xkw.com/dksih/QBM/2021/12/4/2865093377204224/2870013378961408/STEM/8fa1afb89b2f4e78b2a6c1bb2d55e76d.png?resizew=431)
(1)求椭圆C2的右焦点到抛物线C1准线的距离;
(2)当△ABG的面积为
时,求直线AB的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe2381b2935a320e50e12c573685206.png)
![](https://img.xkw.com/dksih/QBM/2021/12/4/2865093377204224/2870013378961408/STEM/8fa1afb89b2f4e78b2a6c1bb2d55e76d.png?resizew=431)
(1)求椭圆C2的右焦点到抛物线C1准线的距离;
(2)当△ABG的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc6356f6dddb6273b928cad8a6baddb.png)
21-22高三上·浙江·期中 查看更多[9]
浙江省湖州、衢州、丽水三地市2022届高三上学期期中检测数学试题山西省大同市第一中学校2022届高三上学期12月月考数学(理)试题(已下线)第十一章 圆锥曲线专练18—抛物线综合练习2-2022届高三数学一轮复习(已下线)一轮复习大题专练73—抛物线7(求直线的方程)—2022届高三数学一轮复习(已下线)2020年高考浙江数学高考真题变式题17-22题(已下线)重难点05 解析几何-2022年高考数学【热点·重点·难点】专练(新高考专用)(已下线)收官卷--备战2022年高考数学一轮复习收官卷(浙江专用)(已下线)专题3.15 圆锥曲线中的面积问题大题专项训练(30道)-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)押全国卷(文科)第20题 圆锥曲线-备战2022年高考数学(文)临考题号押题(全国卷)
更新时间:2021-12-11 07:20:04
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【推荐1】抛物线
的准线过椭圆
的左焦点,以坐标原点为圆心,以
为半径的圆分别与抛物线
在第一象限的部分以及
轴的正半轴相交于点
与点
,直线
与
轴相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/71443ef0-678e-4ca5-93b5-26014e55dd72.png?resizew=180)
(1)求抛物线
的方程;
(2)设点
的横坐标为
,点
的横坐标为
,曲线
上点
的横坐标为
,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbb6cbf601c8d08db363827baefc296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c873f6ad93dfecafd911d3d4c7ebe64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf4b43b6792b9ae78a1c8cae4e60524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/71443ef0-678e-4ca5-93b5-26014e55dd72.png?resizew=180)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc45d3496edabdfaf84aa714fd9fa4df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解题方法
【推荐2】在平面直角坐标系
中,已知椭圆
:
的离心率为
,椭圆的右焦点与抛物线
的焦点重合,过点
(
,
)且不垂直于x轴y轴的直线与椭圆C交于A,B两点,点
为椭圆C外一点,且
.
(1)求椭圆C的方程;
(2)
是否为定值?若是定值,求出该定值,并给出证明;若不是定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bfec4efcc9f0e656d6864daaaef55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26e6e910d5fdd1e28a8ca357ae4c732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be20a7210b16723d7d9a943ecca4c3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba069fd3d0a8244e67f42c73e255d52f.png)
(1)求椭圆C的方程;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
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【推荐1】已知椭圆
长轴的一个端点是抛物线
的焦点,且椭圆焦点与抛物线焦点的距离是1.
(1)求椭圆
的标准方程;
(2)若
是椭圆
的左右端点,
为原点,
是椭圆
上异于
的任意一点,直线
分别交
轴于
,问
是否为定值,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3577bf250e9110428ff34f518fbd9f2.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acf9e2f45e625cbc6d26dd5e292edd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fdffaca7c78d569cfeebb80bfc26329.png)
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【推荐2】已知抛物线
的焦点
到准线的距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/f8cb8574-d5d4-40fc-9e75-b587556a97fd.png?resizew=172)
(1)求抛物线
的方程及焦点
的坐标;
(2)如图,过抛物线
上一动点
作圆
的两条切线,切点分别为
,求四边形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/f8cb8574-d5d4-40fc-9e75-b587556a97fd.png?resizew=172)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)如图,过抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42103f88b80e7ef8bb12c7b839990a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec51d1ad99e9e93296c43ed1b2b8ed5e.png)
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【推荐1】已知抛物线
:
,点
为抛物线
外一点(如图),过点D作
的两条切线,切点分别为A,B.
的方程为
;
(2)若
在直线
上,以
为圆心的圆与直线
相切,且切点为线段
的中点,求该圆的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef72cf8297d91045117d50b4e9d3476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64f2782e222381869ecec738dbe12c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b80f9a90d500b7f4e9dd05c3a57265.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64f2782e222381869ecec738dbe12c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb70fdf064b9193e506ca43f4672af56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba3ea2086e79c4712d27874fc98430b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】已知抛物线
,过点
的直线与抛物线
交于P,Q两点,
为坐标原点.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e32f16d75ccb62a04970f861827fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ee4492a6c457b4743cb6aba37b248d.png)
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